CI for Backend and Frontend #2859

Job	Run time
backend-tests	2m 4s
backend-flake8	15s
backend-isort	11s
backend-black	12s
backend-zpretty	15s
classic-black	10s
classic-flake8	10s
classic-isort	10s
classic-zpretty	15s
frontend-eslint	55s
i18n sync	1m 2s
frontend-prettier	11s
frontend-tests	1m 10s
release (backend, backend, Dockerfile)	5m 23s
release (frontend, frontend, Dockerfile)	6m 56s
release (classic, classic, Dockerfile)	5m 27s
	24m 46s

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